The role of health preservation. Stewed rock sugar from pig's tail can help digestion, promote gastrointestinal peristalsis, improve indigestion, enhance nutrient absorption and resist oxidation. Pig tail is the tail of a pig, which consists of cortex and joints. The peel is rich in gum and thick. It is often used in cooking methods such as roasting, marinating, sauce and cold salad, and has the effects of breast enhancement, beauty beauty and bone strengthening.